(a) (i) What are the thermodynamic quantities of a system that affect the amount and sign of the internal energy change of a system? (ii) Consider the process represented by the following chemical equation: H,O(I) NH,NO3(s) NH4*(aq) + NO (aq) AH = +28.05 kJ/mol Using correct thermodynamic terminology, explain the sign of ATsurroundings for this process. (b) Study the following thermochemical data very carefully: AH° = 242.3 kJ Cl2(g) l2(g) ICI(g) 12(s) → 2CI(g) 21(g) I(g) + CI(g) I2(g) AH° = 151.0 kJ AH° = 211.3 kJ AH° = 62.8 kJ I2(s) reacts with Cl2(g) to produce ICI(g). Write the chemical equation to produce ONLY one mole of ICI(g) (i) Calculate AH° for the reaction of I2(s) with Cl2(g) to form 1 mole of ICI(g). Use all the data given above. (ii) What law did you use to calculate AH° above? (iii) What are the names of the following processes? l2(s) I2(g) I2(g) 21(g) ICI(g) I(g) + CI(g)

(a) (i) What are the thermodynamic quantities of a system that affect the amount and sign of the internal energy change of a system? (ii) Consider the process represented by the following chemical equation: H,O(I) NH,NO3(s) NH4*(aq) + NO (aq) AH = +28.05 kJ/mol Using correct thermodynamic terminology, explain the sign of ATsurroundings for this process. (b) Study the following thermochemical data very carefully: AH° = 242.3 kJ Cl2(g) l2(g) ICI(g) 12(s) → 2CI(g) 21(g) I(g) + CI(g) I2(g) AH° = 151.0 kJ AH° = 211.3 kJ AH° = 62.8 kJ I2(s) reacts with Cl2(g) to produce ICI(g). Write the chemical equation to produce ONLY one mole of ICI(g) (i) Calculate AH° for the reaction of I2(s) with Cl2(g) to form 1 mole of ICI(g). Use all the data given above. (ii) What law did you use to calculate AH° above? (iii) What are the names of the following processes? l2(s) I2(g) I2(g) 21(g) ICI(g) I(g) + CI(g)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

(a)
(i) What are the thermodynamic quantities of a system that affect the amount and sign of
the internal energy change of a system?
(ii) Consider the process represented by the following chemical equation:
H,O(I)
NH,NO3(s)
NH4*(aq) + NO (aq)
AH = +28.05 kJ/mol
Using correct thermodynamic terminology, explain the sign of ATsurroundings for this
process.
(b) Study the following thermochemical data very carefully:
AH° = 242.3 kJ
Cl2(g)
l2(g)
ICI(g)
12(s) →
2CI(g)
21(g)
I(g) + CI(g)
I2(g)
AH° = 151.0 kJ
AH° = 211.3 kJ
AH° = 62.8 kJ
I2(s) reacts with Cl2(g) to produce ICI(g).
Write the chemical equation to produce ONLY one mole of ICI(g)
(i)
Calculate AH° for the reaction of I2(s) with Cl2(g) to form 1 mole of ICI(g).
Use all the data given above.
(ii)
What law did you use to calculate AH° above?
(iii)
What are the names of the following processes?
l2(s)
I2(g)
I2(g)
21(g)
ICI(g)
I(g) + CI(g)

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